Apparatus for the extraction of dust from carpets and other articles.



PATENTED MAY 21,-190'7 P. v;. s0HI6DT..

APPARATUS. FOR THE EXTRACTION OF-DUST FROM CARPBTS AND OTHER ARTICLES.

APPLIUATION FILED MAY 3,1905.

2 smarts-SHEET 1.

I/V VEN'HTO R I WI TNESSE'S:

OTHER ARTICLES. APPLICATION FILED MAY 3.1905.

2 SBBETS-SHEET 2.

INVENTOR:

j wESSESfl v 9/ Alizorr zeygd V caused by the dry dust, and partly on ac- UNI ED STATES PATENT OFFICE.

FREDERIK VILHELM SOHIODT, OF COPENHAGEN, DENMAR K, ASSIGNOR TO HJ. HEIN & MOLLER-HOLST,

OF COPENHAGEN, DENMARK, A FIRM.

APPARATUS FOR THE EXTRACTION F ousr FROM CARF'ETs AND OTHER ARTICLES.

pets, furniture and the like and aims to provide certain improvements therein. lAs usually constructed, devices of 2 this character comprise a suitable suction pump or other air exhausting apparatus adapted to produce a .vacuum, and a suitable mouth piece or suction nozzle adapted to be passed over the surface-of the article to be cleaned, a flexible pipe being interposed between the suction nozzle and the pump. When the dust-laden air is passed directly through the" pump, the valves and pistons of the latter soon become leaky, partly on account of the wear 7 count of the accumulation-of dust in the cyl- 'inder and valves. 3 dust the pump, the dust iven expenditure of Fore been possible. 5

being such that the .upon the dry dust-la A further result is that the adheres to the oiled cylinder walls thus materially increasing the friction of.the piston. To avoid these several disadvantages it has beenpro osed to interpose a filter or dust collector etween the suction mouth. piece and the pump so that the-dust is filtered out of theair before the latter reaches being removed at intervals from the collector. This constructionv has, however, had the disadvantage that the accumulation of dirt in the filters or collect'ors has caused a considerable loss' in the vacuum produced by the pump. As the effective extraction of dust is entirely dependent upon the degree of vacuum which can be obtained at the mouth piece, such construction has not been eificient in practice.

By my invention-I avoid these several dis advantages and obtain greater. vacuum for a power than has hereto- Accordmg to my invention I introduce into the apparatus a supply of water or other fluid, the point at which said supply is introduced ump instead of acting on air,- acts to pump the Specification of Letters lPatent.

luplicatlon filed m a. '1905. Serial m. 258.719.

plete .upper art of said chamber a.

uid is. introduced into the chamber a pump, which latter may be air pump that is to say, capable of taking Patented m 321, 1907.

water and air simultaneously. I Theeffect of introducing the water is to form the dust into a slime, which the pump acts to remove from the apparatus.- v Y My'lnvention embodies certain other inrprovements which will be hereafter referred to. In order that my invention may be more clearly understood, I will proceed to describe the same with reference to the accom panying drawings, in which I Figure 1 is acentral vertical section of .one construction of apparatus embodying my invention. Fig.2 1s a similar section showing another construction of such apparatus.

Fig. 3 is a similar section of the lower part of vthe apparatus of Fig. 2 illustratin a modifi Fig. 4 is a sectional viewi lustrating a comcation. in somewhat diagrammatic form my invention.

Referring to Fig. 1, a is a chamber into which the dust-laden air is conveyed from the suction mouth piece through the usual flexible pi nected wit an inlet 6 shown as'formed at the The water or li bl hr t rough a 'ipe c, prefera y t ough a sprinkler, s reading nozzle or the like; The dust carrie with the air is thus absorbed and mixed with the fluid at the bottom of the chamber a. The bottom of the chamber ais in communication withthe lower part of the a sb-called wet water and air simultaneously. In the construction shown, 6 is a piston provided with a valve or valves, andf are the inlet and outlet valves respectivel .g is the discharge outlet of the ump and h is a partition arranged at the ower part of the pump rendering it certain that the pump operates on both the air and water or other fluid at the same time. In operation the pump produces the necessary vacuum, efiiciently removing the air and dust, the latter being suspended in the liquid and discharged through the outlet 9, into a sewer for instance; or ifit is desired to use the liquid repeatedly, it inay be passed into a filter, centrifugal machine or otherp ing device, the purified liquid being'returned to suction cleaning. apparatus involving;

e orhose, the latter beingconthe'pum.. l It .bebunderstood that a relatively they are easily maintained tight, which is difiicult in the case of a dry air pump. The l vacuum in advance .of the pump, due to accumulations of dust in said filters or screens.

- ployed in connection with a single pump, or

I mouth piece, and by suitably proportioning jected to the excessive wear incurred when large quantity of water should be introduced l into the a paratus, so as to obtain a thorough sliming o the dust. Such quantity of water, hoWever,-mus t not be so large asto reduce the efficiency of the pump so far as its capability of pumping the air is concerned to such an ex- .tent as to. break the vacuum. This might be done if the water was inadvertently introduced so ra idly as to maintain the pump chamber full in which case the pump would act substantially entirely upon the water. It is essential, however, that the water be introduced in relatively large quantities so that after it has taken up the dust it will be in a sufficiently fluid state to be easilyacted upon by the pump: The latter hence constitutes in efl'ect a combined liquid and air pump which continuously or substantially continuously discharges the dust laden fluid and the dust'free air from the apparatus. f

By the device just described, as the dust is suspended in the water or other liquid, the valves and piston of the pump are not subthe pump is acting uponthe dry dust, and as 'such valves and piston areconstantly wet,

vacuum roduced by the present apparatus is much igher than that produced by adry air pump, partly because the valves and piston remain tight, and partly because in my device there is an'absence of. clearance be hind the piston, which clearance is present in the .dry air pumps formerly used. Furthermore, there are no accumulations of dust inthe pump cylinder to interfere with the movements of the piston and. valves. As com ared with those systems in which screens or fi ters are used in advance of the pum my invention shows a decided gain in e ciency, principally because thereis no loss of The fluid may be introduced into the app aratus through the pipe 0, either by external pressure, or by the suction action of the vacuum in the chamber a.

. Instead of utilizin a single mixing chamber, several such 0 ambers may be emvice versa. In thedrawings the chamber a is shown immediately adjoining the pump, but it may be interposed at any other point in the conduit between the suction mouth piece and 'the pump. By arranging the chamber in suitably close relation tothe and inclining the conduit between the chamber and the pump, the settling of dust in the conduit may be avoided, even thou h bends occur in the same. The liquid may e introduced at any point in the apparatus so long as it acts to absorb the dust and permit its ducing the fluid.

being pumped out in suspension in the water.

In'Figs. 2 and 4 I have-shown my inven tion as applied to an apparatus in which the mixing chamber and pump are formed as a single .device. In these figures the pump is of the diaphragm type having a relatively large stroke. In this construction, '5, is the suction pipe, 7: the su'ctionvalve, Z the pump chambe r'which also serves as a mixing space m the diaphragm, n the pressure valve, 0 the piston rod, 1) the discharge opening, and q the jet-pipe. During the upward movement of the piston, air is drawn in through. the

suction pipe 2, and liquid through the jet-pipe g, the air accumulating in the top part of the chamber When the piston moves downwardly it first expels, through the pressure valve n and outlet 1), the air admitted during the previous stroke, and then expels a quantity of liquid corresponding to that taken in during the upward movements thereof. In order to prevent air from gathering, during the last part of the stroke, in the upper an-- nular space surrounding the diaphragm, a special annular valve '1" is preferably arranged at the top of said'space, said valve actin'g during the downward stroke to permit the air to be driven out of the pump chamber so that the latter will beperfectly free of clearance.

desired, or the gathering of the air in the The annular valve 1' may 'be replaced by a number of small valves if pump chamber may be avoided by any other suitable means. In some instances .it may be desirable to omit the pressure valve n inthe piston, a1 hough it is desirable to retain this in most cas s 'as it softens the blow of the piston when the latter strikes the water on its downward movement. 7 The outlet 1) is preferably placed sufficiently above the top of the valve 1" to cause a submersion of the valve even when the diaphragm is in its lowest position. The suction pipe '5 is preferably formed with a Ushaped bend immediately below the pump, so that the liquid leaking through the suction valve 16 will gather therein and be .drawn up into the pump again as soon as it fills the lower curve of the bend.

Instead of using a -jet-pipe q, anyother suitable means may be employed for intro- In Fig. 3 I have showna construction in which the fluid is introduced through holes at or near the seatof the valve 7c so that the seat and valve are hit by the jets and thus constantly rinsed. In this construction a continuous chamber t is provided which encircles the pump chamber, water being introduced into such chamber through an o ening u. Any other suitable means may e substituted for producing this result.

he liquid used may be taken from any source, such. for instance, as a water supply 1 pipe, or from a tank, from which it may flow by gravity, or be drawn up by suction of the ump. h controlled by a valve or cock, and may be e quantity or liquid taken may be T 3 o r j example, my invention as applying to single adjusted according to the quantity of' dust .;.c'ontained in'the air. The air and liquid may be discharged se a-' lrately from the pump by providing a suita le i outlet for the air above the highest level of the, liquid, the discharge pipe p being in this case preferably. arranged below the highest level of the liquid, and isdirected down- .Wardly and then upwardly so that its outer IO end is at.such leyel.

In Fig. 4 I have illustrated a complete apparatus for practicing my invention, showing "the connection of my. device with .a suction nozzle and a source of liquid supply. In

this figure/u is a pump constructed in accordance with'Fig. 2, w is a water tank connected with the water inlet 9, is is a valve controlling the: water supply, and y is a suction mouth piece of ordinary type connected to the i q let he --p1pe p is shown asconnected with a suitable egress tube which leads to a sewer, purifier orthe like.' Similar connections are 'used mouth-piece, a reciprocating pump'fordraw- With the device shown in Fig. 1.

In the drawings I have shown by way of acting piston pumps, but it 1s evident that double acting pumps of any description or other suction lieu of those shown. What I' claim as my invention and desire to secure by Letters Patent, is i 1. In dust extracting apparatus, a suction mouth-piece, means for drawing dust and airtherethrough, and means for introducing substantially continuously into such apparatus a relatively large quantity of liquid sufficient to slime the dust, but insufficient to break the vacuum, said apparatus being adapted to effect a substantlally continuous discharge of the dust laden liquidto remove the dust from the apparatus.

2. In dust extracting apparatus, a suction mouth-piece, a pump for drawing the dust and air therethrough, and means for intro- 7 ducing substantially continuously into such apparatus a relatively large quantity of liquid sufficient to slime the dust, but inremove the dust suflicient to break the vacuum, said pump being adapted to effect a substantially continuous discharge of the dust laden liquid to from the apparatus.

3. In dust extracting apparatus, a suction I mouth-piece, a pump for drawing dust and substantially air therethrough,

continuously and means for introducing into such apparatus in advance of the pump outlet a relasubstantially tively large quantity of liquid sufiicient to slim'e the dust, but insufficient to break the vacuum, said pump being adapted to effect a I continuous discharge of the dust laden liquid to remove the dust from the apparatus.

4. In dust extracting apparatus, a suction devices may be employed in' eliminate the effects of clearance.

lng dust and air therethrough; said-pump havingan inlet and an outlet valve, and means for introducing substantially continuously into such pump between such valves a relatively large quantity of liquid sufficien't to' slime the dust, but insufliclent to break the vacuum, said pump being adapted to efiecta substantially continuous discharge 'of vthe dust laden liquid to remove the dust from the apparatus. I

' 5. In dust extracting apparatus, a suction mouth-piece, a pump for drawin air and dust .therethrough,

vance of the troducing substantially continuously into such chamber a relatively large quantity of liquid sufficient to shine the dust, but insuflicient to break the vacuum, said pump a mixing cham er in, adpump outlet, and means for 111 being adapted to efi'ect a substantially continuous discharge of the dust laden liquidto remove the dust from the apparatus.

6. In dust extracting apparatus, a suction mg air and (lust therethrough, and means for sprinkling liquid directly against a valve seat of said pump whereby to rinse the latter and to m'ix,thedust with the liquid.

7 In dust extracting apparatus, a having a diaphragm, a chamber in Whic said dlaphl'agm works, said chamber being of larger diameter-than the diaphragm so as to provide a space between the latter and the walls of the chamber, and a valve for permittin the escape of air from the upper portion 0 said chamber adapted to open when such diaphragm is depressed whereby to 8. In dust extracting apparatus, a pump having a diaphragm, inlet and outlet valves, a chamber between said valves, means for introducing a liquid-between said valves to absorb the dust passing through said pum and a special valve at the top of said cham er to permit the escapefof air from the upper por' tion thereof so as to eliminate the clearance space. n

9. -Indust extracting apparatus, a suction mouth-piece, means for drawing dust and air therethrough, means for absorbing the dust in a relatively large quantity of liquid in advance of the outlet of said dust and air drawing means, such apparatus having means for dischar ing the liquid containing the dust out of the apparatus, in avoid clogging of the apparatus.

10, In dust extracting apparatus, a suction mouth-piece, means for drawing dust and air therethrough, means for introducing pump l such manner so as to substantially continuously into such apparatus a relatively large quantlty of liquid sufficient t0 slime the-dust, butinsufficient to brake the vaccum, and a chamber in which said fluid and air are introduced, said cham 4 V I U 854,670

an outlet, and the a' aratus. be before it is discharged by the pum and ,iii g -iii i' lii g ed to draw both the ligilid and air means for dlscharglng the dust laden hquid through said outlet. out ofthe apparatus.

. 11. In dust extracting apparatus, a pump In witness whereof I have hereunto s1 ed 1 5 for drawing dust and air therethrough, my name 1n the presence of iZWO "\1l3SCIl mg means for introducing substant ally conwitnesses. tinuo'usly into the apparatus arelatlvely large quantity of liquid sufficient to slime the dust,

FREDERIK VILHELM 'scaltinr."

but insuflicient to break the vacuum, sueh Witnesses: 1o apparatus maintaining a body or liquid JULIUs L HMANN, through Whieh the. air is compelled to rise JOHANNES JENSEN.

854,670.-Federilc Wlhelm Soh'iiidt, Copenhagen, Denmark. AP A ATUS, FOR THE Ex'rmcrion or DUsrF RoM CARPE'rs AND OTHER AR'rIcLEs. Patent'dated-Masr 21 i907. Disclaimer filed July i1, 1914 by the as signee, Paiehts Selling (6 Exporting Com any, Mammal). I Enters its disclaimer Of the claims numbered 9 and 11 of said patent, which arein the following words:

9. In dust extracting apparatus, a suction mouthpiece, means for drawing dust and air therethrough, means for absorbing the dust in a relatively large quani tity of liquid in advance of the outlet of said dust and air drawing means, such apparatus having means for discharging the liquid containing the dust out of the apparatus, in such manner so as to avoid clogging of the apparatus.

11, In dust extraeting apparatus, a pump for drawing dust and air therethrough, means for introducing substantially continuouslyinto the apparatus a relatively large quantity of liquid suficient to slime the dust, but insufficient to break the vacuum, such app'aratus maintaining a body'of liquid through which, the air is compelled to rise before it is discharged byrthe pump and means for discharging the dust laden liquid out of the apparatus.

[Ofim'al Gazette, July 21, 1.914.]-

Disclairher in Letters Patrnf No.v 8546 70.

4 V I U 854,670

an outlet, and the a' aratus. be before it is discharged by the pum and ,iii g -iii i' lii g ed to draw both the ligilid and air means for dlscharglng the dust laden hquid through said outlet. out ofthe apparatus.

. 11. In dust extracting apparatus, a pump In witness whereof I have hereunto s1 ed 1 5 for drawing dust and air therethrough, my name 1n the presence of iZWO "\1l3SCIl mg means for introducing substant ally conwitnesses. tinuo'usly into the apparatus arelatlvely large quantity of liquid sufficient to slime the dust,

FREDERIK VILHELM 'scaltinr."

but insuflicient to break the vacuum, sueh Witnesses: 1o apparatus maintaining a body or liquid JULIUs L HMANN, through Whieh the. air is compelled to rise JOHANNES JENSEN.

854,670.-Federilc Wlhelm Soh'iiidt, Copenhagen, Denmark. AP A ATUS, FOR THE Ex'rmcrion or DUsrF RoM CARPE'rs AND OTHER AR'rIcLEs. Patent'dated-Masr 21 i907. Disclaimer filed July i1, 1914 by the as signee, Paiehts Selling (6 Exporting Com any, Mammal). I Enters its disclaimer Of the claims numbered 9 and 11 of said patent, which arein the following words:

9. In dust extracting apparatus, a suction mouthpiece, means for drawing dust and air therethrough, means for absorbing the dust in a relatively large quani tity of liquid in advance of the outlet of said dust and air drawing means, such apparatus having means for discharging the liquid containing the dust out of the apparatus, in such manner so as to avoid clogging of the apparatus.

11, In dust extraeting apparatus, a pump for drawing dust and air therethrough, means for introducing substantially continuouslyinto the apparatus a relatively large quantity of liquid suficient to slime the dust, but insufficient to break the vacuum, such app'aratus maintaining a body'of liquid through which, the air is compelled to rise before it is discharged byrthe pump and means for discharging the dust laden liquid out of the apparatus.

[Ofim'al Gazette, July 21, 1.914.]-

Disclairher in Letters Patrnf No.v 8546 70.

Disclaimer in Letters Patent No. 8546 70 Disclaimer filed July importing Omnpany, Aktz'eselkab. Enters its disclaimer Of the claims numbered 9 and 11 (3f said patent, which are in be following words: 9. In dust extracting apparatus, a suction mouthpiece. dust and air therethrough, n tity of liquid in the air is compelled te urging the dust laden liquid out of the apparatus.

[Oficz'al Gazette, July 21, 1.91 1 

